Safety device and control fob gas



Nov. 21, 1933- W. 5 VALMORE SAFETY DEVICE AND- CONTROL FOR GAS BURNER'S Filed April 8, 1930 2 Sheets-Sheet 1 Nov. 21, 1933. w. s. VALMORE SAFETY DEVICE AND CONTROL FOR GAS BURNERS Filed April 8, 1930 2 Sheets-Sheet 2 Patented Nov. 21, 1933 UNITED STATES PATENT OFFICE SAFETY DEVICE AND CONTROL FOR GAS BURNERS This invention relates-to a safety attachment or control for gas stoveswitli particular reference to gas ranges.

The main object of the invention is to provide a safety device or control for cutting off the supply of fuel to one or more fuel burners under predetermined conditions. A e

A further objectof the invention is to provide a safety control device for use withgas ranges which embodies a safety or pilot light which is associated with a thermostat for cutting off a supply of gas ,to the burner or burners should the safety or pilot light become extinguished.

A further object of the invention is to provide a safety control device of the character described which is adapted to be arranged adjacent the top burners of a gas range and which embodies a combination safety and pilot light together with thermostatic means for controlling the supply of fuel to the burners.

Another object of the invention is to provide a safety control device of the character described which is of general application and is well adapted for use with practically any type of gaseous fuel burners.

A still further object of the invention is to provide a safety control device of the character described which is dependable and efiicient in operation and comprises comparatively few parts which are readily assembled and disassembled and which are adapted for manufacture at comparatively low cost.

Further and more limited objects of the invention will appear as the description proceeds and by reference to the accompanying drawings in which Fig. l is a fragmentary plan view illustrating the top portion of a gas range having my safety control device associated therewith; Fig. 2 is a fragmentary horizontal sectional view illustrating the control valve and thermostatic means for operating the same; Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 2; and Fig. 4 is a vertical sectional view on the line 44 of Fig. 2.

Referring now to the drawings, the reference character 1 designates a gas range having top burners 2, 3, 4 and 5 arranged thereon in a manner well known to those skilled in the art. The reference character 6 designates a main fuel supply pipe leading from a suitable source of fuel supply and terminating in an inlet manifold '1 to which the burners are connected respectively. The supply of fuel to the burners 2, 3, 4 and 5 may be controlled by the conventional manually 55i operable valves 8, 9, 10 and 11. Arranged within the main supply pipe 6 is a valve casing 12 in which is arranged a valve memberl3 adapted to engage a valve seat 14. Leading from the valve casing 12 is a conduit 15, one end of which is threadedly secured to the valve casing 12 and 0 the other end. of which terminates in an annular casing 16 having a central opening 17 therein. Leading from one side of the casing 16 is a conduit 19 to the outer end of which is secured a burner 20 having a central opening 21 therein. The burner 20 is also provided with a plurality of openings 22, 23 and 24 which are disposed at an angle to the vertical axis of the burner, the purpose of which will hereinafter appear. Arranged within the casing 16 is a thermostat 25, 70, one end of which is rigidly connected with the casing 16 by means of rivets 26. Ihe thermostat 25 is substantially circular, as shown most clearly in Fig. 2, and extends around the opening in the casing 16. Connected with the valvemember 13 is a rod 27 which extends through the tube or conduit 15 and is connected with the opposite end of the thermostat 25 by means of a pin25. The supply of fuel to the burner 20 is controlled by a valve 28 which may be adjusted to control the size of the flame issuing from the burner 20.

Disposed over the casing 16 is a flame spreader 29 having a plurality of tubes or conduits radiating therefrom and leading to points adjacent the burners 2, 3, 4 and 5, respectively.

The burner 20 serves as a combination safety and pilot light. Gas is supplied through the pipe 6 and is delivered through the conduit 15, casing 16, pipe 19 to the burner 20. This burner is normally ignited and flame jets issuing from the angular ports 22, 23 and 24 impinge against the inner wall 16 of the casing 16 and heat the thermostat 25. The thermostat 25, upon being heated, tends to expand and uncoil and actuates the rod 27 to move the valve member 13 from its 9 seat thereby permitting the gas to flow through the pipe 6 to the manifold '7. Any one of all of the burners 2, 3, 4 and 5 may be ignited by turning the respective valves therefor to admit gas to the burners. As long as the combination 00 safety and pilot is burning, the thermostat is heated and maintains the Valve 13 open. Should the combination safety and pilot light become extinguished for any reason, the thermostat will no longer be heated and will cool and contract and move the valve 13 to its seat, thus cutting off the supply of gas to the burners. It will therefore be seen that in order for the burners to be operated, it. is necessary for the combination safety and pilot light to remain ignited. Should any one of the main burners become extinguished, as, for example, when a receptacle boils over, the burner will become re-ignited from the pilot frame issuing from the port 24, thus preventing a large quantity of gas from escaping which might cause an explosion. Should the combination safety and pilot light also become extinguished, the main valve 13 will be closed.

It is, of course, understood that various changes may be made in the details of construction as Well as in the manner of arranging and securing the various parts in place. For example, the flame spreader 29 is not necessary to the successful operation of the device. My control and safety device is also not limited to its use with a gas range but is of general application, and also has particular utility in connection with a gas fired furnace. It is therefore to be understood that the invention is limited only in accordance with the scope of the appended claims.

Having thus described my invention, what I claim is: 1. In a gas range, the combination of a plurality of top burners, a fuel supply pipe for delivering fuel thereto, a conduit leading from said fuel supply pipe and terminating in a casing having a central opening therein, an auxiliary burner disposed below said central opening and connected with the interior of said casing, a valve in said fuel supply pipe for controlling the delivery of fuel to said top burners, said valve having a stem extending through said conduit, a thermostatic element extending about the central opening in said casing and connected with said valve stem and responsive to the heat of said auxiliary burner whereby the supply of fuel to the main burners is controlled by said auxiliary burner.

2. In a gas range, the combination of a plurality of top burners, a fuel supply pipe for delivering fuel thereto, a conduit leading from said fuel supply pipe and terminating in a casing having a central opening therein, an auxiliary burner disposed below said central opening and connected with the interior of said casing, a valve in said fuel supply pipe for controlling the delivery of fuel to said top burners, said valve having a stem extending through said conduit, a thermostatic element extending about the central opening in said casing and connected with said valve stem and responsive to the heat of said auxiliary burner, said auxiliary burner having a plurality of angularly disposed ports therein to cause the flame jets to impinge against the sides of said central opening.

3. In a gas range, the combination of a plurality of top burners, a fuel supply pipe for delivering fuel thereto, a conduit leading from said fuel supply pipe and terminating in a casing having an opening therein, an auxiliary burner disposed below said opening and connected with the interior of said casing, a valve in said fuel supply pipe for controlling the delivery of fuel to said top burners, said valve having a stem extending through said conduit, a thermostatic element extending about the opening in said casing and connected with said valve stem and responsive to the heat of said auxiliary burner, said auxiliary burner having a plurality of angularly disposed ports therein to cause the flame jets to impinge against the sides of said opening.

4. In a gas range, the combination of a plurality of top burners, a fuel supply pipe for delivering fuel thereto, a conduit leading from said fuel supply pipe and terminating in a casing having an opening therein, an auxiliary burner disposed below said opening and connected with the interior of said casing, a valve in said fuel supply pipe for controlling the delivery of fuel to said top burners, said valve having a stem extending through said conduit, a thermostatic element extending about the opening in said casing and connected with said valve stem and adapted to be heated from said auxiliary burner, said auxiliary burner having a plurality of angularly disposed ports therein to cause the flame jets to impinge against the sides of said opening and a vertically disposed port therein providing a pilot burner.

WM. S. VALMORE. 

